Retrieved Bone Screw Made From Co-Cr-Mo Alloy with Casting Defects

ASM Failure Analysis Case Histories: Medical and Biomedical Devices Pub Date : 2019-06-01 DOI:10.31399/asm.fach.med.c0089543

引用次数: 0

Abstract

Threads of a bone screw (Co-Cr-Mo alloy, type ASTM F75) had broken off, and other threads had cracked. 15x sectioning showed porosity, and 155x magnification showed gas holes, segregation, and dissolved oxides. This supports the conclusion that manufacturing defects caused the failure.

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铸造缺陷的Co-Cr-Mo合金复位骨螺钉

一枚骨螺钉(cocr - mo合金，ASTM F75型)螺纹断裂，其他螺纹开裂。15倍切片显示孔隙，155倍放大显示气孔、偏析和溶解的氧化物。这支持了制造缺陷导致故障的结论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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ASM Failure Analysis Case Histories: Medical and Biomedical Devices

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